[ As odd as it sounds, they're in a world where Light can't really question any oddity. It'd be an odd tale to spin and with nothing to gain even if he is lying.

With the introduction, he offers his hand; even being Japanese, Light is well aware of American customs. While he may be wrong, this man looks American. ]

I'm Light Yagami. Previously Detective, but I haven't been able to set up a practice in this world yet. It's nice to meet you, Dr. It sounds like your plate is full enough without offering to watch a stranger while they sleep.